Steam-generator



No. 6|I,4|2. Patented Sept. 27, |898. C. H. KEN'NEY. STEAM GENERATOR.

(Application led Dec. 31, 1897.)

(No Model.)

2 Sheets-Sheet I.

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No. 6||,4|2. Patented Sept. 27, |898.

0. 'H. KENNEY.

STEAM GENERATOR.

(Application filed Dec. 31, 1897.)

2 Sheets-Sheet 2.

WITNESSES *u /z w /VEN @und e/( KJ @www er Y UNTTED STATES PATENT CEErcE.

CHARLES H. KENNEY, CF NEWT-LONDON, CONNECTICUT.

STEAM-GENERATOR.

SPECIFICATION forming part of Letters Patent No. 611,412, dated September 27, 1898. Application nea December 31,1897. sentira. 665,232. ci@ model.)

' a citizen of the United States, residing in the city and county of New London and State of Connecticuuhave invented certain new and useful Improvements in Steam-Generators, which improvements are fully set forth and described in the following specification, reference being had to the accompanying two sheets of drawings.

My invention is in steam-generators of the class in which combined pipes and drums are employed, this class of generators being used to a considerable extent in vessels and like places where space must be economized butwhere a generator of great steaming capacity must be provided. y

My object in producing this invention is to provide a generator any or all of whose component parts may be removed and replaced by removing the front of the casing or shell inclosing said parts, and I also have in view the production of a generator in which steam may be gotten up quickly and in which the caloric products of combustion may be utilized to the greatest extent possible.

In order to clearly explain my invention,

I have provided the annexed drawings, in

which-V Figure 1 is a front elevation of Va steam-generator of my newly-improved form with a portion of its front broken away to expose the interior part, and Fig. 2 is a central vertical sectional view taken on line ww of said Fig. 1. Figs. 3, 4, and 5 are detail views illustrating the form and arrangement of certain pipes hereinafter referred to more particularly. Fig. 6 is a plan view of portions of the sheetmetal casing of the generator proper; and Fig. 7 is an enlarged View of a portion of the downflow-pipe 13aq and of one of the circulation-pipes 17, explaining the means utilized to connect the said pipes.

The oase or shell of my generator is of boiler-iron and is here shown as ofrectangular form. Located in the upper central part of said case and extending nearly from front to rear of the same is a steam-drum, that is indicated by the reference-gure 10, and immediately below and parallel with said steamdrum is a water-drum 11, these two drums being connected near ltheir front and rear ends by pipes 12, through which water in the upper drum, resulting from condensation or other causes, may'drip into the waterfdrum 11.

Referenceffigures 13 14 denote pipes leading from the front end of the water-drum in oppositedirections to the sides of the generator, where they pass downward to a level sufficiently low to bring them within the combustion-chamber, where they are again deflected and extend along the sides, as at `13ad leand iinally along therear, as at 13b 14h, where they meet at the center. At this central rear point they are connected with a similar pipe 15, that leads downward from the rear end of the water-drum 11. (See Fig. 3, which is a rear end view of the steam and water drums and of certain of the pipes connected with said drums.) It will thus be seen that provision is made for the free downliow of the water from the drum 11 through pipes13 and 15 into the pipes 13a ltL 13h14.b and that these last-named pipes are located within the fire-pot or combustionchamber, where their contents may be best influenced by the intense heat of the re.

The feed (water) pipe of my boiler is indicated by the figures 16 and is located in the upper part of the casing, preferably at or about the level of the top of the steam-drum. This pipe 16 branches to the right and left hand just inside the casing, as at 16 16h, and thence passes in the form of three superim posed sets of coils 16C, 16d, and 16e back and each side of thev steam-drum 10, as is clearly shown inthe drawings. The lower coil 16e is connected with and leads into vertically- `arranged loops 16f, extending from front to rear at the sides of the generator, and the terminals of said pipes 16f are connected (at the rear' end of the generator) with pipes 16g, that meet in a pipe 16h, which discharges into the water-drum 11. By means of this arrangement of feedpipes the water is subjected for a considerable length of time to the hot air within the casing of the generator and be comes heated almost to the point of steaming before it passes into the drum 11.

The water-drum 11 is connected on each side by means of a large number of circulation vforth from front to rear of the generator at pipes with the pipes 13a 14, which I have already described as located at each side 'and within the combustion-chamber. These pipes 17 are tapped into said pipes 13 14 and extend upward to a pointsomewhat above the iire-pot and thence extend inward to the center of the generator and back again to the side in a series of superimposed vertical coils 17a, the inner end of the upper of said coils being carried upward and tapped into the steam-drum 10, as best seen in Figs. 1 and 2. The space between the pipes 17 (at opposite sides of the generator) and below the lower coils 17 is utilized as the fire-pot, the grate (not shown) being located at or near the level of line .e of Fig. 1. The ash-pit is indicated by reference-igures 1S.

Referring now to Figs. 2, 3, and 4, it will be seen that the pipes 13b and 14:1 at the lower rear part of the fire-pot have tapped into them a number of pipes 19, that extend upward to about the level of the water-drum 11 and then extend forward nearly to the front of the generator, as at 19, thence back again, and iinally upward nearly to a level with the center of the steam-drum, where they are screwed into a horizontal pipe 20, whose central portion is connected with said steam-drum by a short pipe 21, and whose ends are connected by means of vertical pipes 2O:L 201) with the elbows that connect the lower pipes 13a with 13b and 14 and 14". (See Figs. 2 and 3.) The water-level should be maintained at about the height indicated in Fig. l--that is to say, at or near the level of the top of the waterdrum 11.

The pipes 17 should be located as close together as possible, and I have found it convenient and practicable to connect said pipes with the pipes 13a 11 by means of nipples 22, that are tapped with a right-hand thread to receive pipes 17 and are formed at their other en d with an extension that is provided with a left-hand thread adapted to be screwed into said pipes 13 14a. With this form of connection it is necessary to leave only space enough between pipes 17 to work a spannerwrench.7 The same form of connection may be utilized to connect the pipes 19 at the rear of the generator with pipes 13b 14h and also with the upper pipes 20.

The casing of my generator, as I have stated, is made of sheet metal, and I have secured the front in position in such manner that it may be removed entire or in sections in order that the interior of the casing may be reached whenever it becomes necessary to inspect or repair the interior parts of the generator. I have illustrated said front as formed of four sections, although the number is not material so long as they are each of a size convenient to be handled. These sections are provided at their meeting edges with angle-irons 23, that are securely joined by means of bolts 24; and it will now be understood that either or all of the front sections may be detached by simply removing the bolts 23. For ordinary repairs, however, or for cleaning out between the pipes which I have described in detail doors 25 are provided near the upper part of the generator and opposite the space just above the pipes 19. The feed-doors 26 may also be utilized when it is desired to clean out the re-pot or repair the pipes surrounding or near the same.

The arrangement of all the pipes and other elementary parts of my described generator is such that they may each be readilyreached, removed, and replaced without disturbing the other parts, this being very desirable in marine boilers, which, as a rule, are so located that it is either impossible or very inconvenient to remove the1n from the vessels hold for repairs.

It will now be understood that in a boiler of large size the space above the horizontal pipes 19L will be such that a man may easily enter through the upper doors 25 or through the lower (feed) doors and thus reach every one of the pipes or other interior parts in order to disconnect and remove the same without disturbing the shell or casing of the generator.

The reference-figure 26 indicates a steampipe leading outward from the steam-drum 10, and 27 denotes the smoke-stack.

28 indicates a separator-plate7V located horizontally at or near the centerof the steamdrum 10 and in such relation to the pipes 17 n that any water that may be discharged through said pipes into the drum will be checked and caused to fall to the bottom of said drum, whence it passes by gravity through the pipes 12 downward into the water-drum 11.

By removing the entire front of the casing, as already explained, the interior parts of the generator may be entirely removed and rebuilt without disturbing the rest of the casing.

At one or more points in the lower part of the pipes 13 13b I have provided blow-oft cocks 29, bymean's of which the water may be drawn off or any sediment that may collect in said pipes may be blown off.

Having describedl my invention, I claim as new and wish to secure by Letters Patent- 1. In combination in and with an inclosing case, a steam-drum, an independent waterdrum located below said steam-drum, connections between said drums, 'downflow-pipes leading from the water-drum to and around the lower sides and rear of the generator, and pipes connecting said downflow-pipes with the said steam-drum, substantially as described.

2. In combination in and with an inclosing case, superimposed independent steam and water drums and connections between said drums and a feed-water pipe arranged in superimposed coils or loops at the sides of said drums, substantially as set forth; said feedwater pipe being arranged to discharge into said water-drum.

3. In combination with a pipe-boiler of the IOO IIO

doWniioW-pipes by right and left hand nipples, substantially as specified.

5. In a steam-generator of the class referred to, in combination With a steam-drum, a separator-plate located near the longitudinal eenter of said drum, inlet-pipes 17 discharging into said drum belowsaid plate, and drippipes 12, all substantially as and for the purpose specified.

CHARLES H. KENNEY. Witnesses:

WILSON W. CARROLL, C. M. DABoLL. 

